Teres major muscle

The Teres Major is a muscle located in the upper limb, specifically in the posterior (back) part of the shoulder. It is part of the muscles that contribute to the movements of the shoulder joint.

Originating from the inferior angle and lower part of the lateral border of the scapula (shoulder blade), the Teres Major travels downward and laterally to insert into the intertubercular groove of the humerus (upper arm bone). It is located adjacent to the Teres Minor muscle, and together they form part of the rotator cuff.

Functionally, the Teres Major plays a crucial role in several movements of the shoulder joint. It is involved in the medial rotation and adduction of the humerus. When the Teres Major contracts, it helps pull the arm toward the body and rotates it inward.

The Teres Major works in coordination with other muscles to provide strength and stability to the shoulder joint. It is particularly active during activities that involve pulling or reaching across the body, such as during lifting or throwing movements.

Strengthening exercises that target the Teres Major include lat pulldowns, rows, and exercises that involve adduction and medial rotation of the arm. Stretching exercises for the shoulder region can also contribute to maintaining flexibility and preventing issues related to muscle tightness.

In summary, the Teres Major is a significant muscle in the posterior shoulder, contributing to movements involving adduction and medial rotation of the humerus. Understanding its role and incorporating appropriate exercises are important for promoting overall shoulder strength and functionality.